Julian Hyde created CALCITE-5941:
------------------------------------
Summary: Support LITERAL_AGG in Interpreter
Key: CALCITE-5941
URL: https://issues.apache.org/jira/browse/CALCITE-5941
Project: Calcite
Issue Type: Bug
Reporter: Julian Hyde
In CALCITE-4334 we added {{LITERAL_AGG}}, an internal aggregate function that
returns a constant, but we did not extend {{Interpreter}} to execute queries
containing {{LITERAL_AGG}}. This change fixes that.
Without that change, {{Interpreter}} throws a {{NullPointerException}} during
construction:
{noformat}
java.lang.NullPointerException: agg.state
at java.base/java.util.Objects.requireNonNull(Objects.java:233)
at
org.apache.calcite.interpreter.AggregateNode.getAccumulator(AggregateNode.java:206)
at
org.apache.calcite.interpreter.AggregateNode.<init>(AggregateNode.java:95)
at
org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:54)
at
java.base/jdk.internal.reflect.DirectMethodHandleAccessor.invoke(DirectMethodHandleAccessor.java:104)
at java.base/java.lang.reflect.Method.invoke(Method.java:577)
at
org.apache.calcite.util.ReflectUtil.invokeVisitorInternal(ReflectUtil.java:263)
at
org.apache.calcite.util.ReflectUtil.invokeVisitor(ReflectUtil.java:220)
at
org.apache.calcite.util.ReflectUtil$1.invokeVisitor(ReflectUtil.java:470)
at
org.apache.calcite.interpreter.Interpreter$CompilerImpl.visit(Interpreter.java:358)
at
org.apache.calcite.interpreter.Nodes$CoreCompiler.visit(Nodes.java:48)
at
org.apache.calcite.interpreter.Interpreter$CompilerImpl.visitRoot(Interpreter.java:312)
at
org.apache.calcite.interpreter.Interpreter.<init>(Interpreter.java:88)
{noformat}
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